| 摘要 |
The present invention provides an ink reservoir which gives little reduction of print quality even after a prolonged use and is rigid and flexible enough to te packed into the ink cartridge with ease and maintains a good capacity of reserving an ink over an extended period of time because of an effective networking treatment achieved without heat compression. A novel ink reservoir made of polyurethane for use in printers is provided, prepared from as formulation at least one polyether polyol having an average hydroxyl value of from 30 to 200 mgKOH/g and a foam stabilizer having a surface tension of from 25 to 45 dyne/cm in the form of 1% aqueous solution.
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